Re: Deadlock in multiple CIC.

Jeff Janes wrote:
> c3d09b3bd23f5f6 fixed it so concurrent CIC would not deadlock (or at least
> not as reliably as before) by dropping its own snapshot before waiting for
> all the other ones to go away.
> 
> With commit 8aa3e47510b969354ea02a, concurrent CREATE INDEX CONCURRENTLY on
> different tables in the same database started deadlocking against each
> other again quite reliably.
> 
> I think the solution is simply to drop the catalog snapshot as well, as in
> the attached.

Pushed to all affected branches, along with a somewhat lame
isolationtester test for the condition (since we've already broken this
twice and not noticed for long).

Thanks for the diagnosis and patch,

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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